[PSUBS-MAILIST] Electronics contents gauge

[Stephen Fordyce via Personal_Submersibles]

Hi Alan,
I have pressure transmitters (similar to many commonly used in
industry) that could probably be adapted for that - see attached
photos.  You could replace the end section with a small penetrator/cable
gland plate.  It needs a power supply of 6-30VDC and outputs 0.5-4.5V or
4-20mA (both linear).  They are NPT so you'd need an adaptor for the
SCUBA HP port - but a 1/4" Swagelok thread will fit.

I imagine you're worried about leaks of HP inside, and maybe cost as
well.  Something you may not have thought of is running 1/8" SS tube.  It's
soft enough to bend by hand (more like stiff solid-core electrical cable
than 1/4" tube) and can be run in a bundle with cables.  Also available in
very small inside diameters so flow is greatly restricted.  I've had good
success using it for remote gauge lines.

I also have digital HP oxygen pressure gauges if you ever need one of those
:).

Shoot me an email at Stephen.fordyce at tfmengineering.com.au if you're
interested in one - list price is AU$198.

Cheers,
Steve
(TFM Engineering Australia)

On Mon, Oct 31, 2016 at 7:19 AM, emile via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> The scuba pressure sensors are wireless. Most scuba divers don’t want it
> as it is unreliable.
>
>
>
> Best would be to screw a industrial pressure sensor (with ¼ “thread or so)
> into the penetrator plate and attach a HP line on the outside.
>
>
>
>
>
> Br, Emile
>
>
>
> *Van:* Personal_Submersibles [mailto:personal_submersibles-
> bounces at psubs.org] *Namens *Alan James via Personal_Submersibles
> *Verzonden:* zondag 30 oktober 2016 21:02
> *Aan:* Personal Submersibles General Discussion
> *Onderwerp:* [PSUBS-MAILIST] Electronics contents gauge
>
>
>
> Is there a suitable electronic scuba tank contents gauge out there?
>
> I am after something that plugs in to the high pressure port of the
>
> 1st stage regulator & has wires off it that I can run through a through
>
> hull so I can display the tank contents pressure on a screen.
>
> Trying to avoid bringing high pressure in to the hull.
>
> An alternative may be to run a high pressure line to a through
>
> hull & have an electronic pressure gauge threaded in to this from the
>
> inside of the hull. However with the second method, I wouldn't have
>
> a shut off valve if the pressure gauge failed some how.
>
> Alan
>
>
>
>
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>
>
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